Blender Game Engine: Do something when an 'action' animation happens
You can add a property (float or int) and enter it into the Frame Property field (right lower corner of your image). Then you can check the property with a property sensor.

Be aware that frames are float. Therefore it is better to check against a range e.g. 0.5 ... 1.5 (Interval mode) rather than a concrete value, as it is not likely to match it.